All units/doodads/points/regions on the map can be searched and replaced (Edit>Find/Replace).
Its possible to turn off a layer for rendering (View>Show Layer).
hotkeys for layer shortcuts (T,U,D,P,R,C,H).
pressing the orange buttons in the main toolbar of the editor.
The Terrain Editor is not available when you are working in a Mod.
Terrain Layer, Units Layer, Doodads Layer, Points Layer, Regions Layer, Cameras Layer and Pathing Layer. It also lets you add starting locations, units, doodads, cameras and regions. The Terrain editor is the part of the Starcraft 2 Map Editor that let's you modify the terrain of the map.